Associations of changes in physical activity and discretionary screen time with incident obesity: Findings from the UK Biobank
Oral Presentation A10.4
DOI:
https://doi.org/10.14288/hfjc.v14i3.421Keywords:
Television Viewing, Discretionary Computer Use, Adiposity, Obesity, LongitudinalAbstract
Background: Physical activity (PA) and discretionary screen time (DST; television and computer use during leisure) are both associated with obesity risk, but little evidence exists on their combined influence over time. Purpose: To examine the joint associations of concurrent changes in PA and DST with incident obesity. Methods: Changes in PA and DST over time were defined using departure from sex-specific baseline tertiles and categorised as worsened (PA decreased/DST increased), maintained, and improved (PA increased/DST decreased). Changes in each exposure were then used to define joint PA-DST change variable with nine mutually exclusive groups. We examined the joint associations of concurrent changes in PA and DST with incident obesity using mixed multivariable-adjusted Poisson models. Results: Of the 30,735 participants, 1,628 (5.3%) developed incident obesity over a mean follow up of 6.9 (± 2.2) years. In the direct effect analyses, improving PA (Incident Rate Ratio (IRR) 0.46 (0.38-0.56)) was associated with a lower risk of incident obesity than maintaining PA, maintaining DST, or improving DST. Compared to the referent group (both PA and DST worsened), all other combinations of PA and DST changes were associated with lower incident obesity risk in the joint association analyses. We observed the largest beneficial associations for improved PA across DST change categories [DST worsened (IRR 0.31 (0.21-0.44)), maintained (IRR 0.34 (0.25-0.46)), or improved (IRR 0.35 (0.22-0.55)]. Conclusion: Improving PA had the most pronounced beneficial associations irrespective of DST changes. Future studies with objective assessments of exposure variables will be helpful to understand the relationship better.
Published
How to Cite
Issue
Section
License
Copyright (c) 2021 Susan Paudel, Borja del Pozo Cruz, Elif Inan-Eroglu, Matthew Ahmadi, Emmanuel Stamatakis
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Terms of Publication
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the Health & Fitness Journal of Canada’s right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
- The Contributor (author(s)) represents and guarantees that the Contributor is the sole proprietor of the work and the Contributor has full power to make this Agreement and grant that the work does not infringe the copyright or other proprietary right of any other person; and the work contains no libellous or other unlawful matter and makes no improper invasion of the privacy of any other person. The Contributor also represents and is responsible for the accuracy of the work.
- The Contributor will read, correct, and return promptly galleys and page proofs to the Editor (or designate). The Contributor will be responsible for the completeness and accuracy of these corrections. If the Contributor does not return galleys and page proofs within the schedule agreed upon with the Editor (or designate), the Publisher may proceed without the Contributor corrections.
- When applicable, the Contributor agrees to obtain written permissions and letters of agreement for all matter contained in the work that is protected by existing copyright, paying any permission fees for the use of text or illustrations controlled by others, and furnishing the Publisher with written evidence of the copyright owner’s authorization to use the material.
- When applicable, the Contributor agrees to obtain written permission for inclusion of any photographic materials involving a human subject, and provide the Publisher with written evidence of the subject’s authorization to use this material. In the case of subjects who have not reached the age of majority, the Contributor agrees to obtain and furnish the Publisher with written permission from the parent and/or legal guardian.
- The Contributor may draw on and refer to material in the work in preparing other articles for publication in scholarly and professional journals and papers for delivery at professional meetings, provided that credit is given to the work and to the Publisher.
- This agreement may not be changed unless the Contributor and the Publisher agree to the change by means of a formal addendum signed by the Contributor and the Publisher’s representative.
- This agreement shall be construed and governed according to the laws of the province of British Columbia and shall be binding upon the parties hereto, their heirs, successors, assigns, and personal representatives. Should any formal proceedings related to this agreement be brought, such formal proceeding may be brought only in the province of British Columbia.
By submitting an article to the Health & Fitness Journal of Canada the Contributor has accepted and agreed to all terms outlined in the copyright notice.
